Questions: Wage Determination

Question 1

In a perfectly competitive labor market, the wage is determined by...

• A. Government regulation
• B. The intersection of labor supply and labor demand, where the wage equals the marginal revenue product of labor
• C. Collective bargaining between workers and employers
• D. The cost of living in the region

Answer: (B)

In the competitive model, the market wage is determined by supply and demand equilibrium. At the margin, firms hire until MRPL = w (demand side), and workers supply labor until their marginal disutility of work equals the wage (supply side). The market-clearing wage equates quantity supplied with quantity demanded. This is the baseline model, though real-world wages are also influenced by institutions, bargaining, efficiency wages, and other non-competitive factors.

Question 2

Efficiency wage theory suggests that firms sometimes benefit from paying wages above the market-clearing level.

• T. True
• F. False

Answer: True

Efficiency wage theory proposes several mechanisms by which above-market wages benefit firms: reduced shirking (workers fear losing a valuable job — Shapiro & Stiglitz), lower turnover (reduced recruitment and training costs), better applicant pools (adverse selection — higher wages attract better applicants), and improved morale and effort (gift exchange — Akerlof). In each case, the productivity gain from higher wages exceeds the additional wage cost, making above-market wages profit-maximizing. This explains involuntary unemployment: firms do not lower wages to clear the labor market because doing so would reduce productivity.

Question 3

What factors beyond marginal productivity influence wage determination in practice?

Model answer: Key factors include: bargaining power and rent-sharing (firms with rents share some with workers depending on relative bargaining power), union effects (union wage premiums of 10-20%), minimum wage laws (floor on wages for low-skill workers), efficiency wages (above-market wages to motivate effort or reduce turnover), compensating differentials (premia for undesirable job attributes), discrimination (wage gaps not explained by productivity differences), and institutional norms (internal equity, pay secrecy, minimum hiring standards).

The gap between the competitive model and reality is substantial. Firm-specific wage premiums (identical workers earning different wages at different firms) are a well-documented empirical fact that cannot be explained by competitive theory alone. Card et al.'s work on firm-level wage-setting shows that a significant fraction of wage variation is explained by where people work, not just what they can do — implicating rent-sharing, monopsony power, and institutional wage-setting practices as important determinants.